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This Concept Map, created with IHMC CmapTools, has information related to: PONTIC CLASSIFICATION, Surface irregularities will cause incomplete wetting by the porcelain slurry leading to voids at the porcelain- metal interface, Modified Sanitary (Hygienic) Advantages, Disadvantages not amenable to oral hygiene, PONTIC CLASSIFICATION Depending on Mucosal Contact No Mucosal Contact, Advantages ????, Metal-ceramic pontics Requirements ensure uniform thickness of porcelain, advantages low plaque-retaining capacity, Acrylic Resin-veneered restoration Advantages do not require high-melting range alloys, with Mucosal Contact ???? Conical, advantages low plaque-retaining capacity, cause the fixed prosthodontic appliance to "sag" and distort. hence, based metal alloys should be Sag-resistant, when it is a high stress situation like posterior bridges, Spheroidal aka Dome-shaped, Sharp angles must be avoided because they produce increased stress concentrations that could cause mechanical failure, a slight deflective contour to prevent food impaction and minimize plaque accumulation., when patient has parafunctional habits like burxism, Advantages most similar to the tooth, Sanitary Disadvantage entrapment of food particles, Conical indications posterior areas where esthetics is of minimal concern, Ridge Lap Advantages